I was experiencing the same error on Debian jessie with letsencrypt
0.5.0-1:
Traceback (most recent call last):
File "/usr/bin/letsencrypt", line 9, in <module>
load_entry_point('letsencrypt==0.5.0', 'console_scripts',
'letsencrypt')()
File "/usr/lib/python2.7/dist-packages/letsencrypt/main.py", line
692, in main
return config.func(config, plugins)
File "/usr/lib/python2.7/dist-packages/letsencrypt/main.py", line
504, in obtain_cert
le_client = _init_le_client(config, auth, installer)
File "/usr/lib/python2.7/dist-packages/letsencrypt/main.py", line
356, in _init_le_client
acc, acme = _determine_account(config)
File "/usr/lib/python2.7/dist-packages/letsencrypt/main.py", line
320, in _determine_account
accounts = account_storage.find_all()
File "/usr/lib/python2.7/dist-packages/letsencrypt/account.py", line
160, in find_all
accounts.append(self.load(account_id))
File "/usr/lib/python2.7/dist-packages/letsencrypt/account.py", line
173, in load
regr = messages.RegistrationResource.json_loads(regr_file.read())
File "/usr/lib/python2.7/dist-packages/acme/jose/interfaces.py", line
180, in json_loads
return cls.from_json(loads)
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
297, in from_json
return cls(**cls.fields_from_json(jobj))
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
288, in fields_from_json
fields[slot] = field.decode(value)
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
92, in decode
return self.fdec(value)
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
297, in from_json
return cls(**cls.fields_from_json(jobj))
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
288, in fields_from_json
fields[slot] = field.decode(value)
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
92, in decode
return self.fdec(value)
File "/usr/lib/python2.7/dist-packages/acme/jose/json_util.py", line
489, in from_json
return type_cls(**type_cls.fields_from_json(jobj))
File "/usr/lib/python2.7/dist-packages/acme/jose/jwk.py", line 226,
in fields_from_json
key = public_numbers.public_key(default_backend())
File "/usr/lib/python2.7/dist-
packages/cryptography/hazmat/backends/__init__.py", line 35, in
default_backend
_default_backend = MultiBackend(_available_backends())
File "/usr/lib/python2.7/dist-
packages/cryptography/hazmat/backends/__init__.py", line 22, in
_available_backends
"cryptography.backends"
AttributeError: 'EntryPoint' object has no attribute 'resolve'
This is https://github.com/pyca/cryptography/issues/2838 which states
that python-cryptography requires at least version 11.3 of
python-setuptools 11.3
https://github.com/pyca/cryptography/blob/master/setup.py#L40
I indeed had Jessie's python-setuptools 5.5.1-1. Upgrading this to
18.8-1~bpo8+1 made the error go away.
--
Frederik Himpe <fhi...@vub.ac.be>
Vrije Universiteit Brussel
